How to replace space in a string with \n

[^Bart]

Hello everybody! :)

I got a text and I should replace every space with \n without to use 
str.replace, I thought something like this:

text = "The best day of my life!"

space = (' ')

if text.count(' ') in text:
     space=\n

rightText = text-space

     print(rightText)

I should have an output like this:
The
best
day
of
my
life!